shipley



B. M. SHIPLEY CASH REGISTER Feb. 10, 1931.

4 sheets-sheet 1 Filed July 15, 1928 His attozucgfd B. M. SHIPLEY CASHREGISTER Feb. 10, 1931.

Filed July 13, 1928 4 Sheets-Sheet 2 B. M. SHIPLEY 1,791,907

CASH REGISTER Feb. 10, 1931.

Filed July 13, 1928 4 Sheets-Sheet 3 gmentoz Berni; M. Shipley PatentedFeb. 10, 1931 UNITED STATES PATENT OFFICE BERNIS M. SHIPLEY, OF DAYTON,OHIO, ASSIGNOR TO THE NATIONAL CASH REGISTER COMPANY, OF DAYTON, OHIO, ACORPORATION OF MARYLAND CASH REGISTER Application filed July 13, 1928.Serial No. 292,435.

This invention relates to cash registersand analogous machines, and moreparticularly refers to improvements in adding and subtracting totalizersfor such machines.

As illustrated herein, the invention is embodied in a machine of thetype disclosed in Letters Patent of the United States, No. 1,242,170,issued October 9, 1917, to F. L. Fuller; No. 1,619,796, issued March 1,1927, to Bernis Shipley, and No. 1,761,542,

January 3, 1930, to Bernis M. Shipley.

One object of this invention is to provide an adding and subtractingtotalizer of the type disclosed, with novel mechanism for supplying asingle unit (known in the art as the fugitive 1) to the totalizer wheelof lowest order when the totalizer is overdrawn.

of adding or subtracting totalizer wheels containing the correctbalance.

With these and incidental objects in View, the invention includescertain novel features of construction and combinations of parts,

the essential elements'ofwhich are set forth in appended claims and apreferred form or embodiment of which is hereinafter described withreference to the drawings which accompany and form a part of thisspecification. Of said drawings: Fig. 1 is a sectional view of themachine taken to the right of and looking toward the units bank of keys.

Fig. 2 is a fragmentary view of the total control lever, showingparticularly the manner in which this lever controls the interlock whichenforces the selection of the proper totalizer in totaling operations.

Fig. 3 is a fragmentary view of a part of the transfer mechanism of theunits bank,

showing the means for tripping the transfer device when an overdraftoccurs to supply the fugitive one.

Fig. 4 is a detail side View of the interlocking mechanism between theadding and subtracting totalizers, andthe add and subtract keys.

Figs. 5, 6 and 7 are detail views of parts of the interlocking mechanismshown in Fig. 4.

Fig. 8 is a detail view of the mechanism operated by the totalizer wheelof highest order for tripping the transfer device in the units bank whenan overdraft occurs on the totalizer, and for controlling theinterlocking mechanism to enforce the selection of the proper totalizerin total-taking operations.-

Fig. 9 is a fragmentary view of a part of the tripping device.

Fig. 10 is a top plan view, partly in section, taken on lines 1010, Fig.13.

' Fig. 11 is a detail view of one of the positive totalizer wheels.

Fig. 12 is a detail view, showing the means to restore the unitstransfer stop arm to normal set position.

Fig. 13 is a view looking in the direction of the arrows on line 13-13of Fig. 4, and

shows the adding and subtracting totalizer,

partly broken away to show the wheels of the highest and lowest orders,together with the means for tripping the transfer device in the unitsbank by the wheel of the highest order when an overdraft occurs.

, General description This invention, for convenience, is applied to anadding and subtracting totalizer of the type illustrated and describedin the patents and the application referred to above, the inventionresiding in part, in the provision of a device to automatically cause asingle unit to be added into theunits totalizer wheel when an overdraftoccurs and durin the same operation on which. the overdra t occurs, thusinsuring that the totalizer will register the correct amount at thetermination of the operation.

The novel totalizer selecting and the rectification of the overdraftfeatures are included in a machine substantially the same as thatdisclosed in the above referred to copending application, and enough ofthe former construction is shown herein to convey a full understandingof the present invention, reference being made to the prior patents andapplication cited for a more complete disclosure of those elements whichdo not form a part of the present invention.

Keyboard The machine includes a keyboard having a plurality of banks ofamount keys 40 (Fig. 1), depression of which sets up the amounts to beadded onto, or subtracted from, the adding and subtracting totalizer104, 105, and which are -to be accumulated on any of the othertotalizers with which the machine may be provided.

Only the units bank of amount keys 40 (Fig. 1), and the add and subtractkeys 41 and 42 respectively, (Fig. 4), which control the adding andsubtracting totalizer, are shown herein.

Amount keys and 45, extending between the right sideframe 46 13) and theleft side frame 47 (Figs. 1 and 13) of the machine.

The keys 40 cooperate with a locking detent bar 48 supported at itsupper and lower ends by links 49 and 50 pivoted on the key frame 43.

Depression of a key 40 cams the detent bar 48 downwardly until ashoulder 51 on the key wipes past a stud 52 on the detent, whereupon aspring, not shown, returns the detent bar to its'normal position, withthe stud 52 over the shoulder 51 on the key to lock the latter in its deressed position.

Near the enfof each adding or subtracting operation of the machine, thedepressed keys 40 are released by a rocking release shaft 53 having aplurality of arms 54 fast thereon, which support a rod 55. v

The release shaft 53, when rocked counter clockwise (Fig. 1), pressesthe rod 55 against the tails formed on the free ends of the links 49supporting the upper ends of the detent bars 48 to cam the links 49clockwise about their pivots. The links 49 shift the detent bars 48downwardly to release the depressed keys. Springs (not shown) thenrestore the keys 40 to their home positions.

' The keys 40 of each amount bank control their respectivedenominational zero stop pawl (Fig. 1), the purpose of which is toarrest the corresponding difierential actuator 62, associa d with eachbank of keys when no key in the row is depressed. Depression of a key inany amount row or bank rocks the corresponding zero stop pawl 60counter-clockwise to its inefi'ective position by means not shownherein, but fully disclosed in the above-mentioned patents andapplication.

Amount dz'fierential mechanism The difierential mechanism associatedwith each of the amount banks of keys actuates the totalizers toaccumulate thereon the various amounts set up by depression of theamount keys, and, diflerentially adjusts various other elements, such asindicators, printing elements, etc, none of which are shown hereininasmuch as they form no part of the present invention. .The diderentialmechanism also functions in total taking operations, and at such times,is controlled as to its ad vance by the totalizer wheels.

This differential mechanism is identical with the difierentialmechanisms illustrated and described in the above mentioned patents andapplication, wherefore only a brief description thereof will be given.

The difierential mechanism for each denomination includes adiderentially movable member comprising a pair of substantiallycircular-disks 62 and 63, between which are mounted in peripherallyspaced relation a number of segmental actuating racks 64, 65 and 66corresponding with the number of lines of totalizers in the machine. Thedisks 62 and 63 are fast on a hub 67 journaled on a stud 68 supported byhangers 69 and 70, which in turn, are supported on cross rods 71 and 72extending between the side frames 46 and 47 of the machine. A link 74and a bell crank 75 pivotally support a latch 73 on the difierentiallyadjustable member 62, 63, which latch releasably connects thediderentially adjustable member 62, 63 with an invariably movabledriving segment 7 6 also pivoted on the stud 68. A. spring 77 holds thefoot of the latch 7 3 in engagement with a shoulder (not shown) on theskeletonized drive segment 7 6. A pair of cams 7 8 pinned to a driveshaft ?9 rock a bell crank lever 80 pivoted on the hanger 70. A link 81connects the upper end of the lever 80 with the driving segment 76. Thecams 78 make one complete rotation in clockwise direction at eachoperation of the machine to impart a constant excursion to the drivesegment 76, first clockwise, and then counter-clockwise to normalposition. 011 its clockwise movement, the drive segment ?6 carries withit the latch 73 and the differentially movable member 62, 63 untihtheforward arm of the bell ci ank 75 contacts the inner end of a depressedkey, or the zero stop pawl 60 in those banks wherein no keys have beendepressed, whereupon the bell crank 75 rocks countenclockwise about itspivot and disconnects the latch 7 3 from the drive segment 61. Suchdisconnection of the latch 73 enters the nose thereof into one of aplurality of notches 82 formed in a serrated bar 33 supported on thecross rod 72 and the upper end of the hanger 70, to lock the amount keys40, the end of the beam 90 which is pivoted thereto, is also positioned,after which a roller .93 on the bell crank lever 80 contacts the loweredge of the beam 90, durin g the operation of the machine, to completethe adjustment of this beam, and conse quently adjust the differentiallink 92.

The upper end of each differential link 92 positions its aligning sement 94 on a shaft 96, and the lower end 0 each link positions its arm95 journaled on a shaft 97.

A spiral segment gear 101 fast on the arm 95 meshes with a spiral pinion102 pinned to a printer shaft 103 for the purpose of adjusting thecorresponding printing element (not shown).

After the totalizer actuator racks 64, 65 and 66 have been advanced tocorrespond with the value of the amount keys depressed, the selectedtotalizer, or tot-alizers, are moved into engagement therewith. ,Theactuators 62, 63 are then returned counter-clockwise to their normalpositions at the same time rotating the denominational totalizer wheelsa number of steps commensurate with the value of the amount keys 40depressed, to thereby accumulate on the totalizer the amount set up onthe keyboard The totalizer selecting mechanism and the mechanism ,forengaging and disengaging the totalizers with the actuators are notillustrated or described herein, but are fully disclosed in theabove-mentioned patents and application, to which reference is made fora complete explanation thereof.

T otalize-rs front and the back lines, have ten totalizers oneach line,consisting of a plurality of interspersed adding wheels journaled onatube.

As these totalizers are fully illustrated and dm-zcribed in theabove-mentioned patents, no further description thereof is thoughtnecessary for an understanding of the present invention.

The third or upper totalizer line supports a single adding andsubtracting totalizer comprising a plurality of pairs of wheels (Figs.1, 11 and'12), each pair including a positive wheel 104 and a negativewheel 105 (Fig. 13) spaced apart and rotatably mounted on a totalizershaft 106. Only the pinions of the highest order and of the lowest orderare shown herein. Two intermediate bevel pinions 107 (Fig. 11) loose onthe opposite ends of a pin 108 projecting diametrically through theshaft 106 between the spaced wheels 104 and 105, of each pair mesh withbevel gears 109 and 110 fast on the positive and the negative totalizerwheels 104 and 105, respectively, to couple like denominational wheelsof the adding and subtracting totalizer together in such a manner thatwhen a denominational wheel of one pair is rotated in one direction, theremaining Wheel of the pair will be rotated the same number of steps inthe opposite direction. Collars 111 fast on the outer ends of the pins108 retain the intermediate pinions 107 in place.

The totalizer shaft 106 is mounted in end frames 112 (Figs. 3 and 13)and 113 (Figs. 8, 9 and 13) which depend from and are slid- ,able alonga supporting shaft 115. A rod 114 extends between the frames to affordrig idity and to properly space them apart. This rod 114, the totalizershaft 106, and the end frames 112 and 113 form a frame for the addingand subtracting totalizer slidable longitudinally on the supportingshaft 115.

A rod 120 (Figs. 8, 10 and 13) extending downwardly from the frame 113carries an anti-friction roller 121 embraced between the walls of achannel formed in a drum cam 122. This drum cam is journaled on a studin the side frame 47 and is differentially adjusted under control of theadd key 41 (Fig.4) and the subtract key 42 to shift the adding,subtracting totalizer axially along the shaft 115, to position theadding Wheels 104 or the subtracting wheels 105 opposite the single setof actuators 62, 63 common to both sets of adding and subtractingwheels. The differential mechanism controlled by the add key 41 and thesubtract key 42, for adjusting the totalizer shifting cam 122 to selectthe adding or subtracting side of the totalizer, is identical with thedifferential mechanism disclosed in the inventors co-pending applicationreferred to above, to which reference is made for an explanationthereof, and is not shown herein.

The rod 120 shifts with the adding and subtracting totalizer and isguided, with respect to the shaft 115, by a slot 146 in a bracket 147(Figs. 10 and 13) secured to the left side frame 47. The upper part ofthe roller 121 lies in the slot 146. This bracket also prevents thetotalizer frame from turning about the shaft 115.

As shown in Figure 13, the drum cam 122 is in the position to which ithas been adjusted under control of the subtract key 42 (Fig. 4).Therefore, the negative totalizer wheels 105 are in line with thetotalizer actuator racks 64. When the drum cam 122 is adjusted undercontrol of the add key %1 (Fig. 4),

Fugitive one mechanism During an operation of the machine, if an amountgreater than the amount on the positive wheels 104 is to be subtractedtherefrom, the remainder will be a negative balance. When this happensan overdraft is said to occur. This negative balance will, ordinarilyhowever, be short of the correct amount by one. I

To correct the totalizer so that the appropriate side will register thecorrect amount after an overdraft has occurred, mechanism is provided,in the present machine, iior automatically adding a single unit onto thetotal izer wheel of lowest order during the opera tion in which theoverdraft occurs.

The invention is efiiective to supply the fugitive one in the event theoverdraft occurs by subtracting a larger amount from a smaller amountalready registered on the positive side of the adding and subtractingtotalizer, or by adding a larger amount to a smaller amount alreadyregistered on the negative side of the adding and subtracting totalizer.

The operator in registering positive and negative amounts on the addingand subtracting totalizer will depress the add key 41 to accumulate thepositive amounts on the adding wheels 10 1 of the totalizer, and willdepress the subtract key 42 to accumulate negative amounts on thesubtracting wheels 105.

lhe add and subtract lreys Hand 42 control mechanism not herein shown,to rock the drum cam 122 (Fig, 13) in one direction or the other,whereby to shift the adding and subtracting totalizer along the shaft115 to bring the adding wheels 10%, or the subtracting wheels 105, intoalinement with the single set of actuators 62, 63 common to both thesets of wheels 10 1, 105. Thereafter the positive and negative amountsset 11 on the amount keys are added onto t e corresponding set ofwheels.

Normally the adding and subtracting totalizer is assumed to be clear,that is, the adding wheels 104 of a machine having a capacity of sevendenominations, will register 0,000,000 While the subtracting wheelserner reversely rotate the remaining set of totalizer wheels to directlysubtract a similar amount therefrom, except where the amount added issuliicient to transform the balance from positive to negative, or viceversa.

In the art, this transformation of balance is known as passing throughzero and is accomplished by adding an amount on the negative side whichis in excess of the amount registered on the positive side, or by addingan amount on the positive side which is greater than the balanceregistered on the negative .side.

Assuming that the operator starts with the positive totalizer cleared,as above setforth,

and wishes to enter the following items the proper balance will be 30 0na machine not equipped with this invention, he will first depress theadd key 41 to set the totalizer selecting mechanism (not shown) so thatupon operation of the machine, the adding and subtracting totalizer 104,105 will he slid along the supporting shaft 115 to bring the addingwheels 104 in line with the actuators 62, 63,

He will also depress the proper amount lreys 10 to set up the item 54and operate the machine, whereupon the item 54 will be accumulated onthe adding wheelslOd of the adding and subtracting totalizer so that atthe end of the operation the two sides of the totalizer will registerAdding side 0,000,054 Subtracting side 9,999,945

It will be noted that the wheels 105 of the subtracting side of thetotalizer register an amount which is the complement less 1 of theamount registered by the adding wheels tractin totalizer will registeramounts as follows:

Adding wheels 9,999,958 Subtracting wheels 0,000,041

Here it will be noted that the subtracting wheels register one less thanthe true result, and that the adding wheels register Adding wheels9,999,970 Subtracting wheels 0,000,029

The true balance should be but the subtracting wheels register one lessthan the true balance, while the adding wheels register one less thanthe complement of the amount registered on the subtracting wheels, andas the totalizer is concealed, the operator does not know whether he hasa positive or negative balance, and hence does not know on which side ofthe totalizer he should add the fugitive one.

Heretofore, the fu itive one has been supplied at the end 0 the entry ofall the items, but it obviously would be the better plan to contrivemeans which would cause the totalizer to register the true balance atany point in the operation of entering amounts.

To obtain this result, a transfer mechanism for the units bank isprovided, and means contrived to trip such units transfer mechanism eachtime the balance passes through zero in either direction, the inventionresiding in the novel means emplo ed to trip the transfer mechanism forthe un1ts totalizer wheels 104, 105.

A transfer segment 125 (Fig. 1) formed on the outer end of an arm 119ivoted at 176 between the disks 62 and 63 o the units differential liesin the same vertical plane with the actuator rack 64, and is adapted tobe latched to the actuator rack 64 when the units differential rocksclockwise out of its normal position in the following manner.

A square stud 126 carried by the head of a latching lever 127 pivoted onthe units transfer segment 125, normally rests against the end 128 of atransfer stop arm 129 pivoted on the stationary supportinghanger69,tonormally hold thetransfer segment 125 in the position shown in Figure 1,in which the segment 125 is spaced apart from the adjacent end of theactuator rack 64 against the tension of a spring'130 connected to thehead of the latching lever 127. The spring 130 constantly urges thelever 127 in a counter-clock pgge direction about its pivot on thesegment A recessed projectionor holder 132 is mounted to travel with thedifferential member 62, 63, the tail of the lever 127 having a stud 131normally engaging the projection above its recess 177.

Clockwise movement of the differential member 62, 63 closes the gapbetween the actuator rack 64 and the transfer segment 125, which isyieldingly held against movement by the spring 130 until contact of therack 64 therewith. As soon as this occurs, the spring 130 rocks thelatching lever 127 counter-clockwise and moves the stud 131 on the tailof such lever, into the recess 177 of the projection 132 which advanceswith the differential member 62, 63 and relatively to the lever 127..The lever 127 thus latches the transfer segment 125 to the actuatorrack 64, so that the actuator rack and the transfer se ment now move asa unit.

en the differentials have been arrested under control of the depressedkeys, the wheels 104 or 105 of the selected side of the addin andsubtracting totalizer are enga ed with t eir respective actuator racks64, a ter which the actuator racks are restored to their normalpositions. As the units differential member 62, 63 on its return, asheretofore explained, approaches the position shown in Fig. 1, thesquare stud 126 on the latching levers 127 strikes the end 128 of thetransfer stop arm 129 which arrest causes the lever 127 to rockclockwise about its ivot on the units transfer segment 125 to un ock thesegment 125 from the differential rack 64. The transfer segment 125 isnow held in the position shown in Fig. 1, by contact of the stud 126with the transfer stop arm 129, and the differential continues itsmovement to its normal position.

A flat-stud 135 (Figs. 1 and 3) on a catch 136'fast on a stub shaft 139,normally engages a shoulder 137 formed intermediate the ends of a slot138 in the transfer stop arm 129 to hold the stop arm 129 in the ositionshown, with the end 128 thereof in t e path of the square stud 126,against the tension of a spring 133 connected to the transfer sto arm.Releasing the catch 136 from the shou der 137 frees the transfer stoparm 129 to the action of its spring 133, which rocks the stop arm inclockwise direction (Fig. 3) to re move the end face 128 of the stop armfrom the path of the stud 126 on the latching lever, and thus enable thetransfer segment 125 (Fig. 1) to accompany the segmental rack 64 as thelatter completes its return to home position. This, in effect, lengthensthe rack 64 so as to impart asingle extra step of movement to whicheverunits wheel, 104 or 105, may at that time be in engagement with the rack64.

The upper end Wall of the slot 138 in the catch 136 contacts, and isarrested by, the pin 135 in the catch to limit the clockwise travel ofthe transfer stop arm.

That the units wheel shall be turned but a single additional step, thetransfer stop arm 129 carries a shoulder 134 (Fig. 3) located behind theend face 128, which shoulder is brought into the path of travel of thestud 126 on the latching lever 12? when the end face 128 is removedtherefrom.

At the beginning of the next operation, the actuator 62, 63, carryingthe rack 64, advances in clockwise direction 1), the rack 64 forcing thetransfer segment 125 and the transfer latching lever 127 ahead of it, sothat the stud 126 of the latching lever rides towards the end face 128of the transfer stop arm 129 until it finally escapes past the end ofthe stop arm 129, which is then free to be restored to its normalposition.

The means which restoresthe units transfer stop arm is identical withthat which is shown in the patents and application heretofore mentionedto restore the transfer stop arms therein shown, and comprises arestoring spider 149 (Fig. 12) journaled on the hollow stud 68concentrically with the actuator 62, 63 and the driving segment 76.

A stud 1149 on one arm of the restoring spider 149 extends laterallyinto the path of a face 85 on a suitably journaled driving segment 86identical with the units driving segment 76 and located to the rightthereof.

Cams 87 on the drive shaft 79 rock a lever 88 connected b a link withthe driving segment 86 to roc the latter.

As the driving segment 86 approaches the end of its initial or clockwisestroke, the face thereof strikes the stud 1149 on the spider 149 to rockthe latter and cause an arm 1490 thereof to strike the depending body ofthe transfer stop arm 129 and rock the stop arm counter-clockwise torestore'the stop arm to normal, against the tension of the spring 133.

The stop arm 129, on its return to normal,

brings the intermediate shoulder 137 of its slot 138 above the stud 135of the catch 136 whereupon a coiled spring 141 (Fig. 1) encircling thestub shaft 139, snaps the pin 135 of the catch 136 beneath the shoulder137 of the slot 138 to retain the stop arm with its end face 128 in thepath of the stud 126.

The stub shaft 139, to one end of which the catch 136 is secured, isrotatably mounted in the supporting hanger 69, a trip pawl 140 beingpinned to the other end of the stub shaft. The spring 141 coiled aboutthe stub shaft 139 and having one end secured to a stud 142 in the trippawl 140 and the other end anchored to the supporting hanger 69,

constantly urges the pawl 140 and the catch 136 in clockwise direction.

Obviously the special carry when tripped to add 1 to the units wheel ofthe adding set of totalizer wheels 104, will simultanemenace ouslysubtract a like amount from the subtracting set of totalizer wheels 105,or vice versa, thus supplying the fugitive one, so that the totalizeralways registers the correct balance at the end of each of thoseoperations of the machine during which the bal- I of a pair of laterallyspaced arms 164, 166' journaled on the opposite ends of a stud 165mounted in a flange 148 (Figs. 10 and 12) formed on and extendingtransversely of the free end of the slotted guide bracket 147.

The arms 164 and 166 lie on opposite sides, respectively, of the flange148. A reversing gearing connects the arms 164, 166 including gears 167,171 secured to the hubs 168, 172 of the respective arms 164 and 166, andmeshing with their respective wide pinions 169 and 173, separatelyjournaled on pins projecting from the flange 148, the pinions also beingof suflicient width and so located as to mesh with each other.

This reversing gearing so couples the arms 164 and 166 that when eitherof the arms is rocked downwardly, it will actuate the reverse gearing toswing the remaining arm upwardly.

The control disk 116 with its tripping tooth 117 shifts axially with theadding and subtracting totalizer, so that when the subtracting Wheels ofthe totalizer are in line with the common actuators 62, 63, the controldisk 116 and its tooth are located in line with the arm 164, as shown inFig. 13. When the totalizer is shifted to bring the adding wheels 104into line with the actuators, the control disk 116 and its tooth shifttherewith to loigge the disk and tooth in line with the arm When thetotalizer is moved into engagement with the actuator racks 64, bymechanism well known in the art, which is not described herein,reference being made to the above mentioned patents therefor, thetripping tooth 117 is moved into co-operative relation with either thearm 164 or the arm 166, depending upon which set of totalizer wheels 104or 105 is selected for engagement with the act aator racks 64.

If, after the negative totalizer wheels 105 have been shifted intoengagement with the actuator racks 64, an amount, as 96, greater thanthe amont, as 54, already registered on the positivewheels, isaccumulated on the negative wheels,'the positive wheels 104 are turnedbackwardly past their zero posi tions to their 9 positions. As thepositive wheel 104 of the highest order (Fig. 13) passes from its zeroto its 9 position, the

tooth 117 (Fig. 8) on the disk 116 rigidlyconnected thereto, turns inclockwise direction and wipes over the finger 180 projecting upwardlyfrom the arm 164 to cam this arm downwardly in clockwise direction. Thearm 164, through the train of reversing gears, rocks the arm 166upwardly in counter-clockwise direction. The arm 164, carries a lateralstud 163 on its free end, embraced by a slot in a bell crank 161 pivotedat 162 on the flange 148 of the guide bracket 147. As thearm 164 rocksdownwardly in clockwise direction it rocks the bell crank lever 161counter-clockwise to swing the arm 181 thereof from the full-lineposition shown in Fig. 8, to the dotted-line position there shown.

A transmitting shaft 151 j ournaled in ears forming part of thetotalizer and frames 112,

- 113 (Figs. 3, 8, 9 and 13) carries an arm 159 at that end adjacent thetotalizer of highest value, which arm extends into proximity to the bellcrank lever 161 and is provided with studs 160 disposed one on each sidethereof.

Since the transmitting shaft 151 shifts axially with the adding andsubtracting totalizer, it is necessary to provide these oppositelyprojecting studs 160 so that one or the other thereof will enter thepath of the arm 181 of the bell crank 161 depending upon which side ofthe adding and subtracting totalizer is alined with the common actuators62,63.

When the totalizer is engaged with the actuators, the appropriate stud160 on arm 159 enters the path of the arm 181 of the bell crank 161, asindicated by dotted lines in Fig. 8, so that as the adding wheel 104 ofhighest order with its disk 116 turns reversely 1 through zero, to causethe tooth 117 of the disk to rock the bell crank 161, the arm 181 of thebell crank wipes the stud 160 on the transmitting shaft 15i1 to rock theshaft in counter-clockwise direction.

A second arm, 150 (Figs. 3 and 13) is fast on the shaft 151 at a pointadjacent the units actuator 62, 63, the arm being forked to embrace a in152 on a disk 145 journaled on the totalizer shaft 106, and held inposition by a collar 175 fast on the shaft.

When the totalizer is engaged with the actuators 62, 63, a trippin tooth144 on the trippin disk 145 normafiy assumes a position (sliown indottedlines, Fig. 3) adjacent an car 143 onthe free end of the tripping arm140 fast on the stub shaft 139 which supports the catch 136.

A spring 153 (Fig. 3) connected to a stud 154 .on the arm 150 and to astud 155 on the totalizer end frame 112, normally holds the shaft 151,with its arms 150 and 159, and the tripping disk 145 in the positionsshown in Figure 3. The spring 153 also restores these parts to theirnormal positions near the end of the operation. The stud 155 (Fig. 3)limits the clockwise movement of the arm 150 and consequently of theshaft 151 and its arm 159.

Immediately after the arm 181 (Fig. 8) has passed the stud 160 and hasassumed the position shown by dotted lines, the spring 153 (Fig. 3)rocks the arm 150 and shaft 151 clockwise until the arm 150 is arrestedby the stud 155. This restores the shaft 151, its appended mechanism andthe disk 145 to their normal positions. A stud 182 on a spring-urgedpawl 183 (Fig. 8) cooperates with either of two notches formed in the,

bell crank lever 161 to aline said lever in either of its two positions.

Assuming, as heretofore, that the tripping tooth 117 has wiped over thefinger 180, depressing the arm 164 and raising the arm 166 through thereversing gear, the arms remain in such positions, being held againstaccidental displacement by the engagement of the pawl 183 with a notchin the bell crank 161, until during some subsequent operation of themachine, the adding totalizer wheel 104 of highest denomination passesthrough zero in the opposite direction, whereupon the arm 1810f the bellcrank which has remained in the dotted line position shown in Fig. 8,will be restored to the full line position shown in such figure, duringwhich travel it will rock the shaft 151 against the tension of itsreturning spring 153 (Fig. 3) to again trip the units transfermechanism. I

Referring to Fig. 3, the tripping tooth 144 on the substantiallycircular lever-145 is brought to the position shown by dotted lines, asthe totalizer wheels are engaged with the actuator racks 64. Now, whenthe shaft 151 is rocked counter-clockwise by the tooth 117 as justdescribed, it also rocks'the arm 150 counter-clockwise, and, due to thepin and slot connection 152, rocks the lever 145 clockwise about theshaft 107. On this clockwise movement, the tooth 144 on the lever 145wipes the ear 143 on the pawl 140 to rock this pawl, the stub shaft 139and the tripping arm 136 counter-clockwise to remove the stud 135 on thetrip arm 136 from the shoulder 137 on the transfer stop arm 129,whereupon the spring 133 rocks the transfer stop arm 129 clockwise untilit is arrested by contact of the upper wall of the slot 138 with thestud 135, in which position the shoulder 134 is in the path of thesquare stud 126 on the latch lever 127.

Now, as the actuators 62, 63 return to their normal positions while thetotalizer wheels are engaged therewith, the transfer segment 125 for theunits denomination is permitted to continue its counter-clockwisemovement one step further, or, until the square stud 126' contacts theshoulder 134 on the arrest ing lever 129, which arrests the unitstranser segment. When this occurs, the latching lever 127 rocksclockwise to disengage its stud 131 from the projection 132 on the unitsactuator. At this time, the transfer segment 125-has moved oneadditional step in a counter-clockwise direction, and has therebyadvanced the negative totalizer wheel of the units order one step toaccumulate thereon the single unit known as the fugitive 1.

The-negative totalizer wheels now reg1ster the correct negative balance.

An example of the above operation will now be given to assist in thecomprehension of the mechanism involved.

Since the wheels 105 forming the subtracting side of the adding andsubtracting totalizer at all times register the complement, less one ofthe amount'registered on the adding wheels 104, let it be assumed thatthe two sets of wheels register:

Positive 00250.00 Negative 99749.99

.addin the amount, $255.00, to be subtracted,

onto t e negative totalizer wheels.

In the machines of the prior art referred to, the totalizer wheels wouldnow stand at:

Positive 99995.00 Negative 00004.99

However, in the present invention, when the amount of $255.00 was addedonto the negative totalizer wheels 105, the highest order negative wheel105 was advanced from its 9 to its 0 position, thereby causing thepositive wheel 104 of this order, and consequentIy the tooth 117 rigidlyconnected thereto, to pass from its zero position to its 9 posi: tion,which, as above described, rocks the arm 164 clockwise, and through thetransmitting shaft 151, trips the units transfer device, causing theunits order negative totalizer wheel 105, now engaged with the actuator,to advance one step. At the end of the operation, the totalizer wheelsregister the folowing:

Positive wheels 99994.99 Negative wheels 00005.00

which latter amount is the correct negative balance.

With the adding and subtracting totalizer registering the above amounts,the positive wheels 104 are next selected, and an amount greater than$5.00 is added thereon. Assuming that the amount added is $10.00, as thevtainable on a positive Wheel 104 of the highest order passes from its 9position, in which it was left, to its zero position, the tooth 117likewise moves from its 9 position (Fig. 9) to its zero position (Fig.8), and, since, when the positive wheels were selected for engagementwith the actuator racks 64, the tooth 117 was moved into cooperativerelation with the finger 184 projecting upwardly from the arm 166, thetooth 117 as it wipes the finger 184, in passing from 9 to 0, rocks thisarm clockwise, and, due to the train of reversing gears coupling the arm166 and the arm 164, the latter arm is rocked counter-clockwise, to rockthe bell crank lever 161 clockwise. lhe bell crank lever'161, in turn,wipes the stud 160in the arm 159 to rock the shaft 151 counterclockwiseand trip the units transfer device to cause 1 to be added onto the unitspositive totalizer wheel. The positive totalizer wheels now register thecorrect balance, that is $5.00.

One more example will be given to illustrate that the correct balanceisalways obmachine provided with this novel device.

Heretofore, in machinesof this type, after the negative set of totalizerelements 105 was restored to zero and, as a consequence, the positiveset of wheels 104 were left standing nine, it was necessary to perform ablank operation to restore the positive set of wheels to zero before anamount could be added thereon.

Let it be assumed that the negative wheels 105 of the totalizer havebeen reset to zero. When this has occurred, the positive totalizerWheels 104 are all standing at 9. With the totalizer standing in thisposition, it is desired to add an amount, let us say $12.00, on thepositive side of the totalizer. In adding $12.00 to the positive wheels104, the units of cents and tens of cents Wheels are not disturbed. The12 is added to the units of dollars and tens of dollars wheels,advancing both these wheels to 1 and advancing the wheels to the left ofthe tens of dollars wheel from their 9 to their zero'positions. As thepositive wheel 104 of highest order passes from 9 to zero, the tooth'l17trips the units transfer device to add one to the positive units wheel,so that the operation will have proceeded as follows:

Positive wheels. 99,999.99 Negative Wheels 00,000.00

Add 1 by units transfer to units wheel of positive set Positive wheels00,012.00 Negative wheels The positive wheels 104 now stand at $12.00,which is the correct amount.

The aboveis also true when the positive set of wheels has been restoredto zero and it is desired to add an amount onto the negative set ofwheels.

taking totals Means is provided in the present machine to compel theoperator to take the balance from the proper set of totalizer wheels ofthe adding and subtracting totalizer. This means takes the form of alocking mechanism which operates in connection with the add key 41 (Fig.4) and the subtract key 42 in such a manner that when there is apositive balance on the adding wheels 104, it is impossible to depressthe subtract key 42, and when there is a true negative balance on thesubtracting wheels 105, it is impossible to depress the add key 41.

The keys 41 and 42 when depressed, are held in such positions by meansof a well known locking detent bar, not shown herein,

but which is shown and described in the above mentioned patents, andwhen the keys are released near the end of the operation, they return totheir normal positions under the influence of springs, not shown.

The locking device to compel the operator to take a balance from theproper set of totalizer wheels, is operated by the means which trips thetransfer device for the units totalizer Wheels, and is controlled by thewellknown total control lever 39 (Fig. 2).

One form of such locking device includes a locking sector 185 (Fig. 4)carried by an arm 186 pivotally mounted on a stud 187 in the supportinghanger 69 and a similar hanger 89 (Fig. 7) omitted from Fig. 4 forclearness. The add key 41, when depressed, forces a stud 188 thereonagainst an inclined face 189 on the sector 185 to rock the sector andits arm 186 clockwise about the stud 187.

Similarly, the subtract key 42, when-depressed, forces a stud 190thereon, against an inclined face 191 on the sector 185. The face 191 isinclined in the opposite direction from the face 189, for which reason,the subtract key rocks the sector 185 counter-clockwise i about the stud187.

The sector arm 186 (Fig. 4), which, with its sector, normally occupies aneutral position, is under spring tension in both clockwise andcounter-clockwise directions, and, as explained above, may be rocked ineither direction from its neutral home position by the keys 41 or 42.Upon release of the depressedkey 41 or 42, the sector 185 and its arm186 are restored to neutral or home position by one or the other oftwosprings 201 and 202. The spring 202 holds one arm 203 of a bellcrank204, pivoted on the stud 187, in contact with a stud 205 in the hanger69,

the remaining arm 211 of the bell crank 204 having a stud 206 extendingacross that edge of the sector arm 186 farthest from the stud 205. Thespring 201 is connected to and holds the sector arm 186 in contact withthe stud 206 on the arm 211 of the bell crank 204.

The key 42 (Fig. 4) when depressed, rocks the sector 185 and its arm 186counter-clockwise, but, since the arm 203 of the bell crank 204 abutsagainst the stationary stud 205, the bell crank cannot move in acounter-clockwise direction from the position shown in Fig. 4, for whichreason counter-clockwise movement-of the arm 186 tensions the spring201, which, when the key 42 is released, restores the arm 186 and thesector 185 to neutral position, as shown. The key 41, when depressed,

rocks the sector 185 and its supporting arm' 186 clockwise, and, sincethe arm 186 abuts against the stud 206 in the arm 211 of the bell crank204, the bell crank rocks counterclockwise, thereby tensioning thespring 202,

which, when the key 41 is released near the end of the operation,restores the sector 185, its supporting arm 186 and the bell crank 204to'the positions shown in Figure 4.

Since the adding and subtracting totalizer is concealed within themachine, the operator will not know at the end of a series of addingandsubtracting operations, whether the resulting balance on the totalizeris positive or negative. If it is a positive balance it will beregistered on the adding wheels 104,

whereas if it be a negative balance it will bev registered on thesubtracting wheels 105. And in order to enable the operator when takinga total or sub-total of such balance, be it positive or negative, toselect the proper key 41 or 42 which will set the machine so as to bringthe desired set of wheels 104 or 105 into alinement with the actuators62, 63, the adding and subtracting totalizer is arranged to controlmeans which automatically locks against depression that key 41 or 42which corresponds with the set of wheels which does not bear the correctbalance.

The arm 186 (Fig. 4) has an upwardly extending projection 192 having anopening 193 (see also Fig. 6), formed of a vertical slot and ahorizontal slot connected therewith, through which rojects a stud 194 ona link 195 pivoted on t e end of an arm 196 pinned to a suitablysupported shaft 197 (see also Fig. 13). The stud 194 also projectsthrough a slot 198 (Fig. 7), inone arm 199 of a bell crank 199, 200pivoted on the stud 187.

The arm 200 of the bell crank, when in the position shown in Figs. 4 and7, is normally held against movement by a stud 212 in the link 195 whichseats in a notch in the hanger partway therearound in.such a manner thatwhen the reduced'surfac'e 217 is opposite-the prong 214, the unreducedperiphery of the.

disk is inline with the prong 213,-thereby permitting clockwise movementof the arm 200, but preventing counter-clockwise movement thereof. Whenthe locking disk 215 is rocked counter-clockwise, as will be describedhereinafter, the unreduced periphery will be positioned oppositetheprong 214 and the reduced portion 217 brought to a position opposite theprong 213, thereby permitting counter-clockwise movement of the arm 200and preventing the clockwise movement thereof. j

As mentioned above, the stud 212 in the link 195 normally holds the arm200 in its neutral position and the stud 194 is normally intermediatethe ends of the horizontal part of the opening 193 in the branch 192 ofthe sector-supporting arm 186, thereby permitting the arm to move freelyin either direction independentl of the arm 200. The locking disk 215is, therefore, ineffective to lock the keys 41 and 42 against depressionon adding operations.

When a total is to be taken from the adding and subtracting totalizer,however, it is de-- .sired to lock against, depression that key 41 or42, which selects the totalizer wheels bearing the complement of thetrue balance, or, to state it another way, to enforce the depression ofthe key.41 or 42 which selects the'to-.

talizer wheels on which the correct balance is registered.

In order to provide means for determining which tota'lizer selecting key41or 42 shall be depressed, it is first desirable to connect the keyoperated mechanism, as the sector 185 and its arm 186, with the.variable locking mechanism, as the bell crank 199, 200, and further, toplace the locking mechanism under control of the adding and subtractingtotalizer. i

The connection between the key-operated mechanism and the variablelocking mechanism is accomplished b first adjusting the total controllever 39 ig. 2), the body portion of which has a cam slot 220 formedtherein to accommodate'a stud 218 carried on an arm 219 fast on the endof the shaft 197 which also carries the lifting arm 196 (Fig. 4)

. The stud 218 normally lies intermediate the ends of the cam slot 220in an enlargement thereof. The total control lever 39 when shifted ineither direction from its normal in termediate or add position causesthe wall of the cam slot 220 torock the arm 219 and its shaft 197 inclockwise direction (Fig. 2) to rock the arm 196 clockwise and draw thelink 195 upwardly, thereby displacing the locking stud 212 (Fig. 7) fromits seat in the hanger 89, and positioning the connecting stud 194 inthe vertical branch (Fig. 6), of the inverted T-shaped slot 193 formedin the arm 192 connected to the sector-supporting arm 186. Theconnecting stud 194 when thus-adjusted is still embraced by the slot 198(Fig. 7), in the arm 199 of the bell crank 199, 200.

The variable locking mechanism is controlled by the adding andsubtracting totalizer by extending the transmitting shaft 151, rocked bythe tripping disk 116 (Fig. 8) and tooth 117, beyond the totalizer oflowest order (Fig. 13) to a point adjacent the locking disk 215. An arm236 (see Figs. 4 and 5) fast on the'shaft 151 carries a stud 235 which,in the normal idle positions of the parts, lies apart from the lockingdisk 215, as shown, but when the totalizer wheels are engaged with theiractuators 62, 63, the shaft 151 with its arm 23.6

finger 238 projecting radially from a disk 226 journaled on the stud 216mounted in and projecting on both sides of the hanger 69, on which studthe locking disk 215 is journaled.

A gear 225 (Fig. 13), fast on the disk 226 meshes with a wide pinion 227(Fig. 4), pivoted on. a stud 228 mounted in an ear 229 of a hanger 69,which latter meshes with a second wide pinion 222 likewise pivoted on astud 223 on the ear 224. The lastnamed wide pinion 222 is also in meshwith a gear 221 fast on the looking disk 215 which latter also carries aradially projecting finger 237. i

The gears 225 and 221, and the pinions 227 and 222 constitute areversing gear similar to that associated with the arms 164, 166

(Fig. 8) so that rotation of the disk 226 in -moved therewith to theleft to position the the plane of the finger 237- stud 235 across onthelocking1 disk 215.

Assuming t at an amount is on the posiwheels 105 for engagement wlththeactuator racks 64, the stud 235 of the arm 236 extends aclross the,

tive totalizer wheels 104, and, that a larger in amount is to besubtracted therefrom, the

, totalizer is longitudinally shifted to the position shown in Fig. 13,that is, with the negative wheels 105 in line with the actuator racks64. After the actuator racks are positioned under control of the amountkeys 40 (Fig. '1), the negative wheels 105 of the totalizer are engagedtherewith, such engagement positioning the stud 235 (Figs. 4, 5 and 13),of arm 236 in coy-operative relation with the finger 238 on the disk226. The actuator racks 64 are then restored to their normal positions,thereby accumulating upon the negative totalizer wheels 105 the amountwhich was to be subtracted from the positive wheels 104. At the sametime, the positive wheels 104 are turned backwardly. The amount-thussubtracted from the positive wheels 104 being greater than the amountalready thereon, the tripping tooth 117 (Fig. 8) turns in reversedirection through the zero position, and thereby rocks; the ,arm 164,bell crank 161 and the transmittin shaft 151, as explained above. As thenger 181 on the bell crank 161 (Fig. 8) rocks the shaft 151counterclockwise, the arm 236 (Fig. 4) and the stud 235 thereon arelikewise rocked counter-clockwise, and since the stud 235 was positionedas shown in dotted lines in Fig. 4, the counter-clockwise movementthereof rocks the fin er 238 and the disk 226 clockwise about t e stud216 which, due to the train of reversing gears described above, willrock the locking disk 215 counter-clockwise to position the unmutilatedperiphery thereof in the path of the prong 214 on the arm 200. With thelocking disk 215 in this position, the arm 200 and the arm 186 whichcarries the sector bar 185, are locked against movement in a clockwisedirection, but since the recessed or mutilated part 217 of the disk 215has been brought opposite the' prong 213 of the arm 200, the latter,together with the arm 186, are free to move counter-clockwise. Thelocking disk 215,

therefore, locks the add key 41 4) against depression, and frees thesubtract key 42. Since, on total taking operations, it is necessary topress one of the keys 41 or 42, it can be seen that with the negativebalance on the adding and subtracting totalizer,

the subtract key must be depressed in order to selectv the negativetotalizer wheels 105 for restoration to zero.

A stud 240 (Fig. 4) on a spring-pressed ages one of two notches formedin the dlsk 226 (Fig. 5) to hold this disk and the locking disk 215 inthe positions to which they are adjusted.

Depression of the subtract key 42 at this time forces the stud 190thereon into contact with the inclined edge 191, as described above, toshift thesector bar 185 and the arm 186 counter-clockwise, which, due

the stud 188 therein is forced into contact with the incline 189, whichtends to rock the sector bar-185, arm 186 and arm 200 clockwise. Butclockwise movement of the arm 200, and consequently of the arm 186 andsector bar 185, isp'revented by the unmutilated peripher of the lockingdisk 215 which now lies in the path of the prong 214. The stud 188 onthe key 41 will, therefore, be arrested by the sector bar 185 in itspartially depressed position, and as soon as the pressure is removedfrom this key, a spring (not shown) returns it to its normal position.

Obviously, the arm 236 on the transmitting shaft 151 operates the disk226 and locking disk 215 each time the adding wheel 104 of highest orderpasses'through zero in either direction, the disks remaining in thepositions to which they were last adjusted until the totalizer passesthrough its zero position in the opposite direction, the transmittingshaft 151 being shifted with the totalizer to I position the arm 236adjacent the fingers 237 or 238 depending upon whether the operation isan addition or a subtraction. 7

And if the true balance on the totalizer is positiveQrather thannegative, the parts will be positioned as shown in Fig. 4, wherein thelocking disk 215p'revents depression of the subtract key 42 and permitsdepression of. the add key 41.

The spring 153 (Fig. 3) restores the transmittingshaft 151 and its arm236 (Figs. 4 and 5) to normal after each operation of the shaft by thetotalizer, rockin of the arm 236 being unobstructed by that nger 237 or238 with which the arm is not alined. As the arm 236 rocks one of thefingers 237 in clockwise direction, the remaining finger rocks incounterclockwise direction towards but out of the plane of the arm 236.

Restoration of the total control lever 39 (Fig. 2) to its normal addposition, returns the link 195 to itsnornial position, wherein thecoupling stud 194 lies'in the horizontally extending part of the opening193 thereby disconnecting arms 192 and 199, and the locking stud 212again seats in the notch (F'g. 7) in the [stationary hanger 89 to enablethe selective keys 41 and 42 to freely rock the arm 192 in eitherdirection in selecting the set of adding wheels 104 or 105 to engage theactuators. This adjustmentalso enables the keys 41, 42 when depressed,to lock the total control lever 39 against operation by shifting one endor the other of the horizontal part of the opening 193 over the couplingstud 192.

I While the form of mechanism herein shown and described is admirablyadapted to fulfill the objects primarily stated, it is to be understoodthat it not intended to confine the invention to the one form orembodiment herein disclosed, for it is susceptible of embodiment invarious forms all coming Within the scope of the claims which follow.

hat is claimed as new is:

1. In a machine of the class described, the

combination with an adding and subtracting totalizer having a set ofadding elements and a set of subtracting elements; actuators therefor;and 'a plurality of keys to select the set of elements to be engagedwith the actuators; of normally ineffective means to lock againstoperation that key which selects the adding elements, when the balanceis negative, and to lock the subtracting element-selecting key againstoperation when the balance is positive.

2. In a machine of the class described, the combination with an addingand subtracting totalizer having a set of adding elements and a set ofsubtracting elements; actuators therefor; and a plurality of keys toselect the set of elements to be engaged with the actuators; of normallyineffective means to lock against operation that key which selects theadding elements, when the balance is negative, and to lock thesubtracting element-selecting key against operation when the balance ispositive; and a total control member to render the locking meanseffective or inefl'ective.

3. In a machine of the class described, the combination of an adding andsubtracting totalizer having a set of adding elements and a set ofsubtracting elements; actuators therefor; and means to select which setof elements is to be engaged with the actuators; of normally ineffectivemeans to prevent the selection of the adding elements when the balanceis negative, and to prevent the selection of the subtracting elementswhen the balance is positive; and settable means to control theeffectiveness of the locking means.

4. In a machine of theclass described, the

combination with an adding and subtracting totalizer, having a set ofpositive elements and a set of negative elements; a set of actuatorscommon to both sets of elements; adjustable means to select either setof elements for operation; and a total control mechanism of normall idlelocking mechanism; means controlled by the total control mechanism torender the locking mechanism effective; and

- means controlled by the adding and subtracting totalizer to setthelocking mechanism to enforce the selection for clearing of that setof elements on which is registered the true balance.

5. In a machine of the class described, the combination with an addingand subtracting totalizer, including a set of positive accumulatingelements and a set of negative accumulating elements; either of whichsets may be restored to zero; actuators for said sets of elements; meansto select which of said sets of elements shall be restored to zero; andmeans to condition the machine for restoring the selected set ofelements to zero; of normally ineffective locking means for theselecting means; and means controlled by the highest order totalizerelement as the balance passes from positive to negative and vice versato prevent the selection of any but that set of elements bearing thetrue balance.

6. In a machine of the class described, the combination with an addingand subtracting totalizer having a set of positive accumulating elementsand a'set of negative accumulating elements, either set of said elementsbeing capable of restoration to zero; actuators for said adding andsubtracting totalizers; and

a plurality of keys to determine which of said sets of totalizerelements shall be restored to zero; of normally ineffective lockingmeans for said keys; means actuated by the highest order totalizerelement when the balance passes from positive to negative for lockingthe positive element-selecting key against depression, and actuated whenthe balance passes from negative to positive to lock the negativeelement-selecting key against depression; and a manually operable memberto prepare the machine for total and sub-total taking operations, andrender the locking means effective.

7. In a machine of the class described, the combination with an addingand subtracting totalizer, having a set of positive accumulatingelements, and a set of negative accumulating elements; actuatorstherefor; and means III] means depending upon the nature of the truebalance registered on the tracting totalizer.

8. Ina machine of the class described, the combination with anadding andsubtracting totalizer having a set of positive accumulating elements anda set of negative accumulatadding and subing elements; actuatorstherefor; the accumulating elements normally disengaged froin theactuators; selective means to determine which of the sets ofaccumulating elements shall shift into engagement with the actuators; alock for the selective means to prevent the operation of more than oneofsuch selective means; a second locking mechanism normally ineffectiverelativel to the first-named lock, and including an ad iustable lockingmember; means operable at will to connect or disconnect the two lockingmechanisms; and means to automatically adjust the locking memberdepending upon the nature of the balance registered on the'adding andsubtracting totalizer.

9. In a machine of the class described, the combination with an addingand subtracting totalizer, having a set of-positive accumulatingelements and a set of negative accumulating elements; actuators thereforand manipulative keys to determine which of said sets of accumulatingelements shall shift into engagement with the actuators; of a lockingbar for said keys; an arm actuated by the bar, and normally disconnectedtherefrom; adjustable means to releasably connect said bar with saidarm; an adjustable locking disk adapted in one of its positions to lockthe arm against movement in one direction, and in its other position tolock said arm against movement in the opposite direction; and means toposition the locking disk.

10. In a machine of the class described,

' the combination with an adding and subtracting totalizer having a setof positive accumulating elements and a set of negative accumulatingelements; actuators therefor; keys to determine which of said sets ofaccumulating elements shall shift into engagementv with the actuators;and a locking bar for said keys adapted to be moved in either of twodirections, depending on which of said keys is depressed ofan arm havinga recess formed in the end thereof, said arm being normally disconnectedfrom said bar, and normally locked a ainst movement; manually operablemeans adapted to unlock the arm and connect it with the locking bar; alocking disk associated with the recess in the locking arm to controlthe direction of movement of said arm, thereby locking one of said keysagainst depression; and means under control of the adding andsubtracting totalizer to position the locking disk to lock one of t ekeys against depression.

11. In a machine of class described, the combination with an adding andsubtracting totalizer, having a set pf positive accumulating elementsand a set of negative accumulating element; actuators therefor; aplurality of keys to select which of said sets of totalizer elementsshall be engaged with the actuators; a normally ineffective locking barfor said keys; means to render said locking bar effective on total andsub-total taking operations; a locking member, the position of whichcontrols the direction in which the locking bar can shift, to determinewhich of said keys shall be locked against depression; and meansactuated by the totalizer element of highest order when the balancechanges from positive to negative or from negative to positive, to shiftthe locking member to a position corresponding to the set of totalizerelements on which the true balance is registered, and

to lock against depression the key for selecting the set of totalizerelements upon which the complementary balance is registered.

12. In a; machine of the class described, the combination of an addingand subtracting totalizer having a set of positive accumulating I wheelsand asset of negative accumulating wheels; keys to control the selectionof said sets of totalizer wheels; and means controlled by said sets ofaccumulating wheels to prevent depression of one the keys.

13. In a machine of the class described, the combination of an addin andsubtracting totalizer, including a. set 0 posiitve accumulatin wheelsand a set of negative totalizer wheels; a plurality selection of thesets of accumulating wheels; means normally ineffective to lock the keysagainst depression; andmeans operable when preparation is made torestore one of the sets of accumulating wheels to zero, to rendersaidlocking means effective to prevent depression of one of the keys.

14. In an adding machine, the-combination with a pluralit of sets ofadding wheels; actuators there or; the sets of adding wheels adapted tomove into and out of engagement with the actuators; selective means todetermine which of the sets of adding wheels shall engage with theactuators; and a manipulative member; of a variable locking mechanism todetermine which of the selective means shall be operative; -a shiftabledevice operable by the selective means; and a coupling controlled by themanipulative member to connect theshiftable device and the lockingmechanism against idle relative movement.

15. In an adding machine, the combination with a plurality of sets ofadding wheels; actuators therefor; the sets of adding wheels adapted tomove into and out of engagement with the actuators; selective means todetermine which of the sets of addin wheels shall engage with theactuators; an a manipulative member; of a variable locking mechanism todetermine which of the selective means shall beoperative; a shiftabledevice operable by the selective means; a coupling controlled by themanipulative member to connect the shiftable device and the lockingmechanism against idle relative movement; and a transmitting memberoperable by the adding wheels, to adjust the variable locking mechanismaccording to the condition of the adding wheels.

16. In an adding machine, the combination with a-pluralit of sets ofadding wheels; actuators there or; the sets of adding wheels adapted tomove into and out of engagement with the actuators; selective means todetermine which of the sets of addin wheels shall engage with theactuators; am? a manipulative member; of a variable locking mechanism todetermine which of the selective means of keys to control the.

able by the selective means; a coupling con-,

trolled by the manipulative member to connect the shiftable device andthe locking mechanism against idle relative movement; a transmittingelement operable by the adding wheels according to their condition; and

cording a reversing gearing connected to the locking mechanism, eitherside of which reversing gearing is operable by the transmitting elementto adjust the locking mechanism acto the condition of the adding wheels.

17 In an adding machine, the combination with a plurality of sets ofadding'wheels; actuators therefor; the sets of adding wheels adapted tomove into and out of engagement with the actuators; selective means todetermine which of the sets of adding wheels shall engage with theactuators; and a manipulative member; of a variable locking mechanism todetermine which of the selective means shall be operative; a shiftabledevice operable by the selective means; a coupling controlled by themanipulative member to connect the shiftable device and the lockingmechanism against idle relative movement; a transmitting elementoperable by the adding wheels according to their condition and shiftablewith the adding wheels as the latter shift into and out of engagementwith the actuators; an arm on the transmitting element; :1 train ofreversing gearing connected to the locking mechanism; and a finger onthe respective opposite ends of the train of gearing, the fingers lyingin different vertical and transverse planes, the arm on the transmittingelement adapted to coact with either mine which of the sets of addingwheels shall engage with the actuators; and a manipulative member; of avariable locking mechanism to determine which of the selective meansshall be operative; a shiftable device operable by the selective means;a coupling controlled by the manipulative member to connect theshiftable device and the locking mechanism against idle relativemovement; a transmitting element operable by the adding wheels accordingto their condition, to shift the locking mechanism alternately inopposite directions.

19. In an adding machine, the combination with a plurality of sets ofadding wheels; actuators therefor; the sets of adding wheels adapted tomove into and out of engagement with the actuators; selective means todetermine which of the sets of adding wheels shall nism to determinewhich of the selective means shall be, operative; a shiftable deviceoperable by the selective means; a transmitting element operable by theadding wheels according to their condition, and shiftable with theadding wheels relatively to the locking mechanism, to adjust the lockingmechanism alternately in opposite directions depending upon thecondition of the adding wheels and adapted to restore to normal positionafter each adjusting operation.

20. In a machine of the class described, the combination-with aplurality of sets of adding wheels; actuators therefor; the addingwheels normally disengaged from the actuators; selective means todetermine which of the sets of adding wheels shall engage the actuators;and a manipulative member; of a variable locking mechanism controlled bythe adding wheels to determine which of the selective means shall beoperative; a normally ineffective connection between the lockingmechanism and the selective means; and means controlled by themanipulative memher to render the connection efi'ective or ineffective.

21. In a machine of the class described, the combination with aplurality of sets of adding wheels; actuators therefor; the addingwheels normally disengaged from the actuators; selective means todetermine which of the sets of adding wheels shall engage the actuators;and a manipulative member; of a variable locking mechanism controlled bythe adding wheels to determine which of the selective means shall beoperative; and a connection between the locking mechanism and theselective means, including a normally ineffective coupling between theconnection and the locking mechanism, controlled by the manipulativemember.

22. In a machine of the class described, the combination with aplurality of sets of adding wheels; actuators therefor; the addingwheels normally disengaged from the actuators; selective means todetermine which of the sets of adding wheels shall engage the actuators;and a manipulative member; of a variable locking mechanism controlled bthe adding wheels ,to determine which of the selective means shall beoperative; and normally inefl'ective connecting means between thelocking mechanism and the selective,

tuators; and a manipulative member; of a variable locking mechanismcontrolled by the adding wheels to determine which of the selectivemeans shall be operative; an arm operable by the selective means; anormally inefi'ective coupling between the arm .and the locking.mechanism, and controlled by the manipula tive member; and a normallyeffective retaining means also controlled by the manipulative member.24. Ina machine of the class described, the combination with a pluralityof sets of adding wheels; actuators therefor; theadding wheels normallydisengaged from the actuators; selective means to determine which of thesets of adding wheels shall engage the actuators;-an d' a manipulativemember; of a variable-flocking mechanism controlled by the adding wheelsto determine which of the selective means shall be operative, thelocking mechanism having a slot; a connection between the lockingmechanism and the selective means having an opening, one branch of whichregisters with the slot in the locking mechanism; and a coupling elementextending through the slots and adjustable by the manipulative memberinto and out of the registerin portions of the slot and opening.

25. n a machine of the class described, the combination with a pluralityof sets of adding wheels; actuators therefor; the adding wheels normallydisengaged from the actuators; selective means to determine which of thesets of adding wheels shall engage the actuators; and a manipulativemember; of a variable locking mechanism controlled by the adding wheelsto determine which of the selective means shall be operative; aconnection between the locking mechanism and the selective means,includirig a normally in effective coupling between the connection andthe locking mechanism, controlled by the manipulative member; and aretaining device to hold the locking mechanism inactive while theconnection between the selective means and the locking mechanismv isineffective.

26. In a machine or the class described, the combination of an addingand subtracting totalizer, including a set of positive wheels and a setof negative wheels; a segment normally ineffective to actuate the unitsorder wheel; means to render the segment effective to advance the unitsorder wheel a single step; a member movable in either direction tooperate said means; and means intermediate the totalizer wheel ofhighest order and the member to actuate said member.

27. In an adding and subtracting totalizer, the combination of atransmitting element; a drive member associated with the units ordertotalizer wheel; means controlled by the transmitting element to permitthe drive member to turn the units order totalizer wheel asingle step;rocking arms; reversing gearing coupling the arms; means connected toone of said arms and operable in opposite directions to actuate thetransmitting element, and means controlled by the highest ordertotalizer wheel to actuate one or the other of said. arms when saidhighest order totalizer wheel passes the zero point in either direction.

28. In an adding and subtracting totalizer; the combination of atransmitting element intermediate the totalizer wheels of highest andlowest order normally inefi'ective means, including a drive member, toturn the totalizer wheel of lowest order a single step; means actuatedby the transmitting element to render the drive member efiective; meansoperable in either direction to rock the transmitting element; rockingarms; a train of reversing gearing coupling the arms for actuating saidmeans; and means controlled by the totalizer wheel of highest order torock one or the other of the arms when said highest order totalizerwheel passes the zero point in either direction.

29. In a machine of the class described, the combination with an addingand subtracting totalizer shiftable axially to either of two positions;means, including a drive member to turn the totalizer wheel of lowestorder a single step; a transmitting element to render the drive membereffective, and shiftable with the totalizer; means to rock saidtransmitting element in one direction regardless of the position towhich it is shifted; and means actuated by the totalizer wheel ofhighest order as it passes the zero point in either direction to actuatethe last-named means.

30. In a machine of the class described, the combination with an addingand subtracting totalizer; actuators therefor with which the totalizerengages and disengages; and a normally ineffective drive means to turn atotalizer wheel of lower value one step; of means controlled by atotalizer wheel of higher value to control the one-step rotation of thetotalizer wheel of lower value, including a transmitting elementshiftable bodily with the adding and subtracting totalizer, andextending between the totalizer wheels of higher and lower orders; meanscontrolled by the totalizer wheel of higher value to operate thetransmitting element in one direction subsequently to the engagement ofthe totalizer with the actuators; and means acuated by the transmittingelement to render the drive means eflective.

31. In a machine of the class described, the combination with an addingand subtracting totalizer; and 'drive means normally ineffecti? to turna totalizer wheel of lower value one step; of means controlled by atotalizer wheel of higher value to control the one-step rotation of thetotalizer wheel of lower value, including a transmitting elementextending between the totalizer wheels; means actuated on the totalizerwheel of higher order; and

a leverage operated by the actuating member to shift the transmittingelement.

32. In a machine of the class described, the combination with an addingand subtracting totalizer; and drive means normally inefi'ective to turna totalizer wheel of lower value one step; of means controlled by atotalizer wheel of higher value to control the one-step rotation of thetotalizer wheel of lower value, including a transmitting elementextending between the totalizer wheels; means actuated by thetransmitting element to render the drive means effective; an actuatingmember on the totalizer wheel of higher order; rocking arms alternatelyoperated by the actuating member; reversing gearing connecting the arms;and a lever connected to one of the arms and rocked in oppositedirections by the arms to shift the transmitting element in onedirection, irrespective of the direction in which the lever rocks.

33. In a machine of the class described, the combination with an addingand subtracting totalizer, including a series of positive totalizerWheels and a series of negative totalizer Wheels; actuators for theWheels; the totalizer normally disengaged from the actuators, andshiftable into and out of engagement therewith and axially relativelythereto; of means controlled by a totalizer wheel of higher value toturn a totalizer wheel of lower value one step, including a drivemember; a transmitting element extending between the said totalizerWheels; a lever operated by the trans mitting element to render thedrive member effective; an actuating member associated with thetotalizer wheel of higher value; rocking arms alternately operated bythe actuating member, the rocking arms lying in difl'erent vertical andhorizontal planes; re versing gearing connecting the arms; a leverconnected to one of the arms and rocked alternately in oppositedirections to shift the transmitting element in a single direction; andmeans to restore the transmitting element and the first-named lever tonormal after each operation of the second-named lever, thetransmitting'element and its first-named lever shiftable withthetotalizer and normally in ineffective relation to the second-named leverand the drive member, respectively.

34. In an adding and subtracting totalizer,

the combination with a drive member to impart a single-step of rotationto a totalizer wheel of lower order; of an axially shiftable actuatingmember associated with a totalizer of higher order; rocking armsalternately operated by the actuating member; reyersing gearinconnecting the arms to bring one of sai arms into operative position asanother of said arms is operated; a transmitting element extendingbetween the part a single step of rotation to a totalizer i wheel oflower order; of an actuating member associated with a totalizer wheel ofhigher order; rocking arms alternately operated by the actuating member;reversing gearing connecting the arms; a lever connected to one of thearms and operable alternately in op- .posite directions; a transmittingelement between the totalizer wheels of higher and lower orders; and anarm on the transmitting element removably positioned in the path oftravel of the lever and rocked thereby together with the transmittingelement to control the operation of the drive member for the totalizerwheel of lower order.

36. In an adding and subtracting totalizer, the combination with a drivemember to turn a totalizer wheel of lower order one step; of anactuating member associated with a totalizer wheel of higher order; atransmitting element extending between the totalizer wheels of higherand lower order; an arm on the transmitting element adjacent thetotalizer of higher value; means alternately travelling in oppositedirections to rock the' arm and the transmitting element to control theoperation of the drive member and means intermediate the actuatingmember and the last-named means, and-operated by the actuating member toshift the first-named means alternately in opposite directions as thenature of the true balance on the totalizer changes.

37. In a machine of the class described, the combination with an addingand subtracting totalizer; and drive means normally inef fective to turna totalizer wheel of lower value one step; of a transmitting elementextending between the totalizer wheels; means controlled by thetotalizer wheel of higher value to operate the transmitting element inone direction; means actuated by the transmitting element to render thedrive means ef-

